2. WHAT DOES IT DO
• It collects oxygen from the air. Oxygen is mixed with nutrients
to produce energy.
• It releases the carbón dioxide that our body doesnt need.
3. THIS IS THE PROCESS:
•1. First, air enters through our mouth and nose.
•2. Then, it goes down the pharynx and trachea.
•3. The trachea is a long tube that divides into two
tubes called bronchi.
4. THIS IS THE PROCESS:
• 4. The bronchi are divided into lots of bronchioles.
Bronchioles are like bronches.
• 5. At the end of broncioles we can find alveoli. Alveoli are
covered with capillaries. Some capillaries are coulored red
and others are coulored blue.
• 6. In the alveoli the exchange of gases takes place: the red
capillaries absorb oxygen and the blue capillaries absorb
carbon dioxide.
• 7. Finally the carbon dioxide is released.
